<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <!--https://cdn.staticfile.org/font-awesome/4.7.0/css/font-awesome.css-->
    <link rel="stylesheet"
          href="../css/font-awesome-4.7.0/css/font-awesome.min.css">

</head>
<body>
    <h2><i class="fa fa-500px"></i> fa</h2>
    <h1>fa fa-ambulance</h1>

    <i class="fa fa-ambulance"></i>
    <i class="fa fa-ambulance" style="font-size:24px"></i>
    <i class="fa fa-ambulance" style="font-size:36px"></i>
    <i class="fa fa-ambulance" style="font-size:48px;color:red"></i>
    <br>

    <p>按钮中使用:</p>
    <button style="font-size:24px">按钮 <i class="fa fa-ambulance"></i></button>

    <p>Unicode:</p>
    <i style="font-size:24px" class="fa">&#xf0f9</i>

</body>
</html>